Simultaneous Equations by Substitution

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1. Isolate an unknown in one of the equations.
2. Substitute the expression of this unknown into the other equation, obtaining an equation with only one unknown.
3. Solve the equation.
4. The value obtained is substituted into the other equation.
5. The two values obtained are the solution of the system.

sistema
1Isolate x.
despejar
2Substitute this into the other equation.
ecuación
3 Solve the equation.
ecuación ecuación
4Substitute the value.
solución
5Solution:
solución

Examples

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